Return of incandescent light bulbs as MIT makes them more efficient than LEDs

Wohoo! Say bye bye to LEDs and Hello Again to our beloved incandescent light bulbs! MIT discovered a way of improving them making them even better than LEDs. 40% energy efficient rather than the ugly non-green-old-fashioned 5%. LEDs hold 15% efficiency so maybe...
http://ift.tt/1PSMOWW
Researchers at MIT have shown that by surrounding the filament with a special crystal structure they can bounce back the energy which is usually lost